Calculating Furnace Size?


The best way to calculate a furnace size is to ask a contractor. They are trained in things like this and can ensure your sizing is done properly. The scientific method used is called The manual J load calculation.
Q&A Related to "Calculating Furnace Size?"
1. Use a furnace calculator, such as HVAC Equipment Size Finder, Home Heat Loss Calculator or the Energy Star Furnace Calculator, to determine the amount of BTUs needed for your home
1. Find the volume in cubic feet of the room. Measure the length, width and height of the room. Multiply the measurements on your calculator. The total is the volume in cubic feet
1. Imagine that your plate is divided into four equal sections. This is referred to as the divided plate method for estimating appropriate portions at mealtime. This method works
1. The cylinder formula requires radius and length. Determine which shape fits the tank most closely. For example, a corn silo is cylinder-shaped, so you know the height, you can
1 Additional Answer
There are many ways to calculate the right furnace size for your house, and it is important that you do so. The most accepted method is the Manual J Load calculation that factors in construction material, insulation levels, windows, and sizes of rooms among other things. The software to do this calculation is available for purchase. If you are replacing an existing furnace you can simply replace it with a model that has the same output BTU.
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